主权项 |
1. A method, comprising:
generating, by a mobile device, an audio sample of a voice received via a call; associating, by the mobile device, the audio sample with a contact participating in the call, wherein the contact is included in a contact list of the mobile device; and sampling, by the mobile device, audio from an environment to determine whether the contact is in the environment, wherein the determination is based, in part, on the audio sample of the voice.
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